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    • 4. 发明授权
    • Disk apparatus and head positioning method
    • 磁盘设备和磁头定位方法
    • US06982848B2
    • 2006-01-03
    • US10852135
    • 2004-05-25
    • Toshio InajiKeizo MiyataHiroshi KohsoMakoto Umeda
    • Toshio InajiKeizo MiyataHiroshi KohsoMakoto Umeda
    • G11B5/596G11B21/02
    • G11B5/596G11B5/5582G11B21/106
    • A disk apparatus includes: an actuator 7; a driver 10; a voltage detector 11 for outputting first voltage signal Ed which is produced in a driving coil 5 of the actuator 7; a voltage signal adjuster 16 for outputting pseudo disturbance signal ur and generating second voltage signal Ed+ from pseudo disturbance signal ur, driving signal u, first voltage signal Ed, and disturbance estimation signal τdest; a disturbance estimator 12 for estimating the magnitude of disturbance load τd applied to a magnetic head 2 from driving signal u and second voltage signal Ed+ to output disturbance estimation signal τdest; a position detector 13 for generating position error signal e which corresponds to a current position of the magnetic head 2; a position controller 14 for generating control signal c from position error signal e; and a corrector 15 for generating driving signal u from disturbance estimation signal τdest and position control signal c.
    • 盘装置包括:致动器7; 司机10; 用于输出在致动器7的驱动线圈5中产生的第一电压信号Ed的电压检测器11; 用于从伪干扰信号ur输出伪干扰信号ur并产生第二电压信号Ed + SUP的电压信号调节器16,驱动信号u,第一电压信号Ed和干扰估计信号taud < / SUB>; 用于估计从驱动信号u和第二电压信号Ed + SUP施加到磁头2的干扰负载taud的大小的干扰估计器12,以输出干扰估计信号taud < 用于产生对应于磁头2的当前位置的位置误差信号e的位置检测器13; 位置控制器14,用于从位置误差信号e产生控制信号c; 以及用于从干扰估计信号taud和/或位置控制信号c产生驱动信号u的校正器15。
    • 6. 发明授权
    • Method for recording magnetic recording medium
    • 记录磁记录介质的方法
    • US06646820B1
    • 2003-11-11
    • US09869947
    • 2001-07-03
    • Tatsuaki IshidaTaizou HamadaHideyuki HashiKeizo MiyataYasuaki BanHiromi Kita
    • Tatsuaki IshidaTaizou HamadaHideyuki HashiKeizo MiyataYasuaki BanHiromi Kita
    • G11B586
    • G11B5/865G11B5/127G11B5/23G11B5/82
    • A master information carrier (2) with an arranged pattern formed of a ferromagnetic film in a shape corresponding to information signals is superposed on a magnetic recording medium (1) and the arranged pattern formed of a ferromagnetic film is magnetized with a magnetizing head (6), thus transfer-recording the arranged pattern into the magnetic recording medium as a magnetized pattern. The magnetizing head includes an annular magnetic circuit with a gap, and a strength of a magnetic field applied to the master information carrier by magnetic flux leaking from portions other than the gap is set to be 20% or less of that of a magnetic field applied to the master information carrier by magnetic flux leaking from the gap. Quality deterioration due to various conditions during recording can be prevented and uniform recording with less variation depending on position on the magnetic recording medium is achieved.
    • 具有与信息信号相对应的铁磁膜形成的排列图案的主信息载体(2)叠加在磁记录介质(1)上,由铁磁膜形成的排列图案被磁化头(6 ),从而将布置的图案作为磁化图案转印记录到磁记录介质中。 磁化头包括具有间隙的环形磁路,并且通过从除了间隙之外的部分泄漏的磁通量施加到主信息载体的磁场强度设定为施加的磁场的磁场强度的20%以下 通过磁通从主信息载体泄漏出来。 可以防止由记录期间的各种条件导致的质量劣化,并且实现根据磁记录介质上的位置具有较小变化的均匀记录。
    • 8. 发明授权
    • Head positioning method, and disk apparatus using the same
    • 头定位方法和使用其的磁盘装置
    • US07019938B2
    • 2006-03-28
    • US10692652
    • 2003-10-27
    • Keizo MiyataToshio InajiHiroshi Kohso
    • Keizo MiyataToshio InajiHiroshi Kohso
    • G11B5/596
    • G11B5/5552G11B21/083
    • A first estimator 13 estimates the position of a head based on a VCM driving signal u1 and a voltage signal Va output from a VCM 6 to output a first head position estimation signal x1est. The first estimator 13 estimates the disturbance acting on a head supporting mechanism 8 to output a disturbance estimation signal τdest. A second estimator 15 estimates the displacement of the head based on a control signal c2 for a fine adjustment actuator 7 to output a displacement estimation signal x2est. The first head position estimation signal x1est and the displacement estimation signal x2est are added together to obtain a second head position estimation signal xest. A position error signal e is generated using a head position signal x obtained by detecting the servo information and the second head position estimation signal xest. A disturbance compensator 10 synthesizes a VCM control signal c1 with the disturbance estimation signal τdest to generate the VCM driving signal u1.
    • 第一估计器13基于VCM驱动信号u 1 1和从VCM 6输出的电压信号Va来估计头的位置,以输出第一头位置估计信号x&lt; 1& SUB>。 第一估计器13估计作用在头支撑机构8上的扰动,以输出干扰估计信号τ> dest dest dest。 第二估计器15基于用于精调节致动器7的控制信号c 2估计头的位移,以输出位移估计信号x2stest 。 将第一头部位置估计信号x 1&lt; 1&gt;和位移估计信号x&lt; 2est&gt;相加在一起以获得第二头部位置估计信号x 。 使用通过检测伺服信息和第二打印头位置估计信号x获得的打印头位置信号x来产生位置误差信号e。 干扰补偿器10将VCM控制信号c 1与干扰估计信号τSUB分配,以产生VCM驱动信号u 1。
    • 9. 发明授权
    • Master information carrier and method for manufacturing magnetic disk
    • 主信息载体和制造磁盘的方法
    • US06980380B2
    • 2005-12-27
    • US10330172
    • 2002-12-27
    • Keizo MiyataHideyuki HashiTatsuaki Ishida
    • Keizo MiyataHideyuki HashiTatsuaki Ishida
    • G11B5/82G11B5/86G11B23/50
    • B82Y10/00G11B5/743G11B5/82G11B5/865G11B23/505
    • A master information carrier includes a high-level region and a low-level region that are formed on a non-magnetic base. The high-level region includes a ferromagnetic thin film pattern that corresponds to preformat information signals. The master information carrier is brought into close contact with a magnetic disk by exhausting a gas from a hole of the magnetic disk to generate negative pressure in a space between the low-level region and the magnetic disk. In this case, to prevent deformation of the central portion of the master information carrier, an inner edge of the high-level region in the radial direction is extended to the vicinity of a hole edge of the magnetic disk so that a portion of the high-level region comes into contact with the vicinity of the hole edge. This configuration can improve the close contact between the master information carrier and the magnetic disk, thus achieving higher reliability of magnetic transfer recording.
    • 主信息载体包括形成在非磁性基底上的高电平区域和低电平区域。 高电平区域包括对应于预格式化信息信号的铁磁薄膜图案。 通过从磁盘的孔排出气体而使主信息载体与磁盘紧密接触,以在低电平区域和磁盘之间的空间中产生负压。 在这种情况下,为了防止主信息载体的中心部分的变形,高度区域的径向内侧的边缘延伸到磁盘的孔边缘附近,使得一部分高 水平区域与孔边缘附近接触。 这种配置可以改善主信息载体和磁盘之间的紧密接触,从而实现更高的磁转移记录的可靠性。
    • 10. 发明授权
    • Head positioning method, and disk apparatus using the same
    • 头定位方法和使用其的磁盘装置
    • US06903896B2
    • 2005-06-07
    • US10606124
    • 2003-06-26
    • Keizo MiyataToshio Inaji
    • Keizo MiyataToshio Inaji
    • G11B5/55G11B5/596
    • G11B5/5526
    • A disturbance compensation signal is produced by estimating the magnitude of disturbance acting upon an actuator based on a driving signal and a voltage signal generated when driving the actuator. A control signal is produced by multiplying the disturbance compensation signal by a gain adjustment coefficient. A head position error signal is produced based on the target position of a magnetic head and the current position of the magnetic head that is detected based on servo information recorded in advance on a magnetic disk. A gain adjuster obtains the driving signal by adding together the control signal and a position control signal. The actuator is driven with the driving signal output from the gain adjuster.
    • 通过基于驱动信号和驱动致动器时产生的电压信号来估计作用于致动器的干扰的大小来产生扰动补偿信号。 通过将扰动补偿信号乘以增益调整系数来产生控制信号。 基于磁头的目标位置和基于预先记录在磁盘上的伺服信息检测的磁头的当前位置来产生磁头位置误差信号。 增益调节器通过将控制信号和位置控制信号相加在一起来获得驱动信号。 致动器由增益调节器输出的驱动信号驱动。